Human milk is unquestionably the milk of choice in infant feeding, but when human milk cannot be obtained artificial feeding must of course be employed. During the past few years many milk mixtures have been devised, and much progress has been made in artificial feeding. The Eiweissmilch of Finkelstein and Meyer1,2 has been used extensively in all countries, and generally with very good results. The great drawbacks to its use are the complexity of its preparation, and the undesirability of employing it for prolonged periods. Heim and John,3 Feer,4 and recently Stoeltzner5 have so simplified the method of making it that Eiweissmilch can now be easily and cheaply made in private homes. Stoeltzner's method, consisting in adding a preparation of calcium-casein to one pint of milk and one pint of water is the simplest method. Bertlich,6 and also Wegener7 have recently treated a large